An OPC data source is configured on the OPC Connection node.
Advanced
-
Convert Boolean Values: Select True to convert the Boolean values into integers (0 and 1). This allows the aggregates to be calculated.
-
Disable Subscriptions: Select True to disable the OPC subscription functionality. This will force j5 to poll OPC for values.
-
Ignore OPC Timestamp: Select True to ignore the timestamp that OPC specifies. The time the event arrives in j5 is used as the time.
-
Ignore Time Bias: Select True to ignore the OPC time bias. This is helpful when the OPC time bias has been configured incorrectly.
-
Read Timeout: Enter the number of seconds before a tag reading times out.
-
Use Cached Reads (Faster): Select True if you want to use the cached readings on the OPC server. When False is selected, the readings are collected from the device. This is more accurate, but it can be very slow.
Heartbeat
-
Heartbeat Tag: Enter the identifier for a heartbeat tag. j5 listens to this tag to detect disconnection events.
-
Heartbeat Update Interval: Enter the expected maximum number of seconds between each change ("heartbeat") on the Heartbeat Tag.
-
Maximum Heartbeat Errors: Enter the number of read errors j5 should encounter before it does a forced reconnect.
Misc
-
Disable Auto-Prefix of Datasource Name: Select True if you don't want the ‘opc_’ prefix to be added to the data source name in j5.
-
Display Possible Tags: Select True to read the possible tag identifiers on the OPC tag database. These tag readings can be tracked in the j5 Event Manager application. When False is selected, a manual tag entry is still possible.
The Display Possible Tags setting can cause performance issues with large OPC tag databases when set to True.
-
OPC Server: Enter the url of the OPC server you want to connect to.
-
Server: Enter the name of the computer running the OPC server.
-
Source Type: Select Real-time (OPC DA) or Historical (OPC HDA).
-
Timezone: Enter the name of the OPC server's time zone (for example, Africa/Cairo).